<template>
    
       
<el-container class="home-container">
    <!-- 头部区域 -->
    <el-header>
        <div>
            <img src="../assets/heima.png" alt="">
            <span>电商后台管理系统</span>
        </div>
         <el-button type="info" @click="logout">退出 </el-button>
    </el-header>   
    <!-- 页面主题区域       -->
 <el-container>
     <!-- 侧边栏 -->
    <el-aside :width="isCollapse ? '64px': '200px'">
        <div class="toggle-button" @click="toggleCollapse">|||</div>
      <el-menu background-color="#333744" text-color="#fff"    
      active-text-color="#409eff" :unique-opened="true" :collapse="isCollapse" :collapse-transition="false" :router="true" :default-active="activePath">
       <!-- 一级菜单 -->
       <el-submenu :index="item.id+''" v-for="item in menulist" :key="item.id">
           <!-- 一级菜单模板区域 -->
        <template slot="title">
            <!-- 图标 -->
          <i :class="iconsObj[item.id]"></i>
          <!-- 文本 -->
          <span >{{item.authName}}</span>
        </template>
      <!-- 二级菜单 -->
        <el-menu-item :index="'/'+subItem.path" v-for="subItem in item.children" :key="subItem.id" @click="saveNavState('/'+subItem.path)"> 
             <template slot="title">
            <!-- 图标 -->
          <i class="el-icon-menu"></i>
          <!-- 文本 -->
          <span >{{subItem.authName}}</span>
        </template>
        </el-menu-item>
      </el-submenu>
    </el-menu>
    </el-aside>
    <!-- 右侧主体区域 -->
    <el-main>
        <router-view></router-view>
    </el-main>
  </el-container>
</el-container>
   
</template>

<script>
export default {
    data(){
        return{
            menulist:[],
            iconsObj:{
                '125':'iconfont icon-user',
                '103':'iconfont icon-tijikongjian',
                '101':'iconfont icon-shangpin',
                '102':'iconfont icon-danju',
                '145':'iconfont icon-baobiao'
            },
            //是否折叠菜单
            isCollapse:false,
            //被激活的连接地址
            activePath:''
        }
    },
    created(){
        this.getMenuList()
        this.activePath=window.sessionStorage.getItem('activePath')
    },
    methods:{
        logout(){
            //清空token
            window.sessionStorage.clear()
            //重新跳转到登陆页面
            this.$router.push('/login')
        },
        //获取所有左侧菜单
        async getMenuList(){
            const {data:res}=await this.$http.get('menus')
            if(res.meta.status!==200) return this.$message.error(res.meta.msg)
            this.menulist=res.data
            //   console.log(res)
            
        },
        //点击按钮，控制菜单的折叠和展开
        toggleCollapse(){
            this.isCollapse=!this.isCollapse
        },
        //保存连接的激活状态
        saveNavState(activePath){
            window.sessionStorage.setItem('activePath',activePath)
            this.activePath=activePath;
        }
       
    }
}
</script>

<style lang="less" scoped>
    .home-container{
        height: 100%;
    }
    .el-header{
        background-color: #373d41;
        display: flex;
        justify-content: space-between;
        padding-left: 0;
        align-items: center;
        color: #fff;
        font-size: 20px;
    }
    .el-header div{
        display: flex;
        align-items: center;

    }
    .el-header span{
        margin-left: 15px;
    }
    .el-aside{
        background-color: #333744;
    }
    .el-menu{
        border-right: 0;
    }
    .el-main{
        background-color: #eaedf1;
    }
    .iconfont{
        margin-right: 10px;
    }
    .toggle-button{
        background-color: #4a5064;
        font-size: 10px;
        line-height: 24px;
        color: #fff;
        text-align: center;
        letter-spacing: 0.2em;
        cursor: pointer;
    }
</style>